Fur sewing machine

ABSTRACT

AN IMPROVED APPARATUS FOR GUIDING STRIPS OF FUR TO THE FEED MECHANISM OF A FUR SEWING MACHINE. THE APPARATUS IS ARRANGED TO MAINTAIN A GUIDE SHOE IN A VARIABLY POSITIONED MEDIAL PLANE BETWEEN A FEED WHEEL PAIR AND ALSO WITHIN THE MEDIAL PLANE TO ASSURE A UNIFORM DEPTH OF FUR SKIN TAKEN UP BY A SEAM FORMED BETWEEN STRIPS TO BE SEWN TOGETHER. ALSO, THE GUIDE MECHANISM EMPLOYS A COMBINED AIR NOZZLE AND GUIDING BLADE WHICH IS ADJUSTABLE TO ACCOUNT FOR AN IMBALANCE OF HAIR EXTENDING FROM THE EDGES OF THE FUR STRIPS ON THE SEAM.

March 1971 F. L. OLDAY 3,572,268

FUR SEWING MACHINE Filed Aug. 22, 1969 3 Sheets-Sheet 1 FIG. 2.

r 32 W m 64 [30 I I mvsrwon FRED L. OLDAY BY I r qg ngwg mwwz/ w i m/TURNEYS March 1971 F. OLDAY 3,572,268

FUR SEWING MACHINE Filed Aug. 22, 1969 3 Sheets-Sheet 2 FIG/3. 7

mvmmm FRED L. OLDAY gmefloim QW LW A ()RNEYS March 23, 1971 F. L. OLDAYFUR SEWING MACHINE 3 Sheets-s 5 Aug 22' FIG. IO.

FIG. 9,

INVENTOR FRED L. OLDAY I A OHM-1V5 United States Patent O 3,572,268 FURSEWING MACHINE Fred L. Old-ay, 505 Bogart Place, Scranton, Pa.

Filed Aug. 22, 1969, Ser. No. 852,413 Int. Cl. D05b 35/00, 23/00 US. Cl.112149 11 Claims ABSTRACT OF THE DISCLOSURE BACKGROUND OF THE INVENTIONThis invention relates to improvements in fur sewing machines and moreparticularly, it concerns an improved guide means for directing stripsof fur to the feed mechanism of a fur sewing machine which operates toform a longitudinal seam joining the two strips of fur together.

In the manufacture of fur such as mink for garments, it is commonpractice to employ the letting out process to modify the shape of a skinbefore it is sewn together with other skins to form the ultimategarment. The letting out process calls for slicing the skin intodiagonal strips Me to A inch in width and sewing the strips togetherafter they have been oifset in the direction of slicing to make a longerand narrower skin to run the full length of the garment without seamsshowing on the fur side. It will be appreciated that this technique ofmodifying the shape of the skin is extremely tedious and requires highlyskilled personnel, even when using currently available, precision sewingmachines, because of the tolerances required in making a strong seamwithout wasting an inordinate amount of the fur strip in the seamitself. In US. Pat. No. 2,588,281, issued Mar. 4, 1952 to the presentinventor, there is disclosed a guide mechanism for such fur sewingmachines by which much of the difliculty theretofore encountered infeeding fur strips to a sewing machine was appreciably alleviated.Essentially, the guide mechanism shown in the aforementioned patent isin the form of an inverted V-shaped guide shoe, having downwardlydiverging side blades and a central separating blade, which functions sothat the height to which the edge portions of the strips of fur projectabove the feed wheel pair in a horizontal needle machine can becontrolled accurately by varying the height of the guide shoe relativeto the feed wheels and needle.

While the basic guide mechanism disclosed in the above-mentioned US.patent has proven to be effective in achieving its intended objective(i.e. reducing the time and skill necessary to obtain a uniform and evenseam), some difiiculty has been experienced in the fur snagging orbunching against the central separating blade of the guide or otherwiseextending through to the skin side of the fur and thus interfering withthe formation of a completely acceptable seam. A partial solution tothis problem is provided by recently developed sewing machines whichemploy a jet of air positioned ahead of or upstream from the guide shoe,in terms of direction of feed, so that the fur will be blown out frombetween the 3,572,268 Patented Mar. 23, 1971 strips of skin to be sewn.In apparatus heretofore available however, the air stream is directednormal to the skins and does not take into account the transverse lie ofthe fur on the adjacent skin strips to be sewn. In this latter context,it is noted that in most skins which are sliced diagonally in accordancewith the letting out process referred to above, the hair on the skinlies in a direction transversely to the length of the strip. As aresult, it often occurs that the hair on one of the two strips to besewn lies or extends away from the edge of one strip whereas on theadjacent strip to be sewn thereto, the hair lies out over the edge to besewn. As a result of this condition, there is an imbalance of hair onopposite sides of a normal medial plane between the two strips to besewn. This imbalance of hair is neither accounted for by the air jetdeveloping means in machinery presently available nor is it accommodatedby the guide shoe of such machinery.

Another deficiency in available guide mechanisms for fur sewing machinesof the type shown in the above-mentioned US. patent, is that ofmaintaining the guide in a central position relative to the nip of thefeed wheel pair which presents the edges of the fur strips to the needleof the machine. In this connection, it is noted that in fur sewingmachines of this type, one of two cooperating feed wheels is rotatedintermittently about an axis fixed with respect to the machine housingwhereas the other, though spring biased against the fixed wheel is freeto move outwardly from the fixed wheel to accommodate differentthicknesses of skins. For example, in the case of mink, the skinthickness in a female hide usually will be about .020 inch whereas thethickness of skin in a male hide will run as high as 0.060 inch. Thus itwill be appreciated that the medial plane between the feed rolls willshift outwardly from the fixed roller by a distance corresponding to /2the variation in the double thicknesses of skins to be sewn. Althoughoptimum guiding of the strips to the wheels requires that the guide shoebe positioned directly on the medial plane between the feed discs,machines heretofore available have fallen short of such optimum guidingbecause they have not made provision for the varying thicknesses ofskins to be sewn.

SUMMARY OF THE PRESENT INVENTION In accordance with the presentinvention, an improved apparatus is provided for guiding fur strips to asewing machine which both compensates for the transverse lie of fur onadjacent skin strips to be sewn as well as for different thicknesses ofskin. Essentially, the present invention contemplates a guide shoeresembling that illustrated in the present inventors prior US. Pat. No.2,588,281, but in which the central separating blade of the shoe ispivotal over at least the forward portion of its length to account forthe imbalance of hair on opposite Sides of a transverse medial planepassing between the strips to be sewn. Pivotal action of the separatingblade is augmented further by an adjustable air jet nozzle which coactswith the separating blade in such a manner that when the blade ispivoted in one direction or toward that strip in which the hair linesaway from the edge to be sewn, the air jet will be directed against thehair on the other strip which projects into the space between the two.In this manner, the edges of the skin to be sewn are cleared of hair ina highly eflective manner.

Also, the guide shoe and air jet are supported from the sewing machinehousing to be adjustable relative to the medial plane between the feedwheels of the sewing machine. Moreover, means are provided for renderingthis adjustment automatic in accordance with travel of the movable oneof the feed wheel pair as different thicknesses of skin are fedtherebetween. Vertical adjustment of the guide shoe is also contemplatedto insure the proper depth of seam uniformly in a manner resembling thatof the guide mechanism illustrated in the aforementioned US. patent.

Among the principal objects of this invention are therefore: theprovision of an improved guide apparatus for fur sewing machines; theprovision of an improved guide mechanism of the type referred to, whichis adjustable to compensate for the imbalance of hair between a normalmedial plane between the strips of fur to be sewn; the provision of sucha guide mechanism in combination with an adjustable air jet nozzle tofurther compensate for the imbalance of hair between the strips asaforementioned; and the provision of a guide apparatus of the typereferred to, which will be maintained automatically and precisely oncenter between the feed wheels of a fur sewing machine. Other objectsand further scope of applicability of the present invention will becomeapparent to those skilled in the art from the detailed description tofollow, taken in conjunction with the accompanying L FIG. 1 is aperspective view of a fur sewing machine incorporating the improvementsof the present invention;

FIG. 2 is a fragmentary, enlarged cross-section taken on line 22 of FIG.1;

FIG. 3 is a fragmentary perspective view of the machine shown in FIG. 1but with the cover thereof opened;

FIG. 4 is an enlarged fragmentary cross-section taken on line 44 of FIG.2;

FIG. 5 is a fragmentary perspective view similar to FIG. 3 but with thehousing riser portion and cover pivoted to an open position;

FIG. 6 is an exploded view showing the components of the improved guidemechanism of this invention in a retracted position;

FIG. 7 is a fragmentary front elevation of the assembled guidemechanism;

FIG. 8 is an enlarged perspective view illustrating a component of theguide mechanism;

FIG. 9 is an enlarged fragmentary front elevation illustrating the guidemechanism of this invention directing fur strips to the feed wheel pairof a fur sewing machine;

FIG. 10 is an enlarged fragmentary cross-section taken on line 10-10 ofFIG. 9;

FIG. 11 is an enlarged fragmentary cross-section taken on line 11-11 ofFIG. 9; and

FIG. 12 is an enlarged fragmentary cross-section taken on line 1212 ofFIG. 9.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A fur sewing machineincorporating the improvements of the present invention is shown in FIG.1 to include a housing, generally designated by the reference numeral10, and having a lower base portion 12, an intermediate riser portion 14and cover portion 16. In accordance with conventional practice, thelower housing portion 12 includes a boss 18 for supporting the bearingand final drive components of an intermittently driven, rotatable feedwheel 20 having a fixed vertical axis established by the boss 18. Asecond, movable feed wheel 22 is supported freely for rotation, also ona vertical axis, by a journal 24 carried on the lower end of an arm 26formed as an integral extension of a beam 28 cantilevered from the frontend of a slide rod 30 (FIG. 2). Resilient means, depicted by thecompression spring 32 in FIG. 2 of the drawings, functions to bias theslide 30 and thus the arm 26 in a direction such that the movable feedwheel 22 is yieldably biased against the fixed feed wheel 20 as shown inFIG. 1. A horizontal needle 34 is carried by reciproeating meanssupported by the housing base 12 above the feed wheels 20 and 22 incooperation with a needle guide 36 fixed above the movable feed wheel22. The needle 34 cooperates with a looper 38 to form a seam between 4two strips of fur skin fed by the wheels 20 and 22 when the machine isdriven by power transmitted to a fiy wheel pulley 40.

The sewing machine components described above, as well as all othercomponents thereof supported directly by the lower base portion 12 areconventional and well known to those familar with the fur sewing art.Additional information concerning such sewing machines may be found byreference to the above-mentioned US. Pat. No. 2,588,281 and further byreference to US. Pat. No. 2,132,379, issued Oct. ll, 1938, to C. Bonis.The point at which the structural organization of the present inventiondeparts from that of conventional fur sewing machines is depicted mostclearly in the drawings by the riser 14 and the components carrieddirectly thereby. In this context it is noted that in conventional fursewing machines, the cover 16 carries a lubricant to be dispensed bysuitable means to the movable machine components incased within thelower housing part 12 and is movable away from the upper portion of thehousing part 12 to facilitate inspection and maintenance of such sewingmachine components. In accordance with the present invention and asshown in FIGS. 1 and 2, the cover 16 is pivotally supported on the riser14 by hinges 42 located to the rear of the housing and retained in aclosed position by latch means 43 on the front thereof. The riser 14, inturn, is pivotally mounted to the top of the lower housing 12 by similarhinges 46 and retained in a closed position against the housing byresilient latch means 48. Thus, it will be appreciated that the riser14, as well as the parts carried thereby, can be easily incorporated asa module in the existing structure of presently available fur sewingmachines merely by inserting the riser between the cover 16 and thelower housing portion 12.

As shown in FIGS. 1, 3 and 5 of the drawings, a fiuid conveying tube 50is rotatably and slidably supported by the riser 14 by bearing openingsformed in the front and rear walls respectively of the riser. The rearend of the tube 50 is connected to a source of compressed air (notshown), by a flexible hose 51. The portion of the tube 50 projectingfrom the front of the riser is formed to provide a lateral arm 52 whichcarries the improved fur strip guiding mechanism of this invention,generally designated in the drawings by the reference numeral 54.Although the details of the guide mechanism 54 will be described morefully in the description to follow, it will suffice at this point tonote that the guide mechanism is positioned relative to the feed wheels20 and 22 as well as the needle 34, both in term of vertical elevationor height above the operating plane of the needle and laterally withreference to a vertical medial plane passing through the nip of therollers 20 and 22, by movement of the tube 50 on which it is supportedby the arm portion 52 thereof. Specifically, relative verticalpositioning of the guide mechanism 54 and the feed wheels 20 and 22 iseffected by rotation of the arm 50 whereas lateral positioning of theguide mechanism relative to the medial plane of the feed wheel nip iseffected by longitudinal sliding movement of the tube 50.

The manner in which the tube 50 is positioned automatically to bringabout proper position of the guide mechanism 54 may be understood byreference to FIGS. 2-5 of the drawings. As shown in FIGS. 4 and 5, acollar 56 is clamped to the exterior portion of the tube 50 extendingbetween the front and rear walls of the riser 14 by suitable means suchas clamping screws 58. The collar is formed with a radially extendingcar 60 for supporting a laterally extending pin 62 carrying a camfollower bearing 64 on its outboard end. Thus it will be seen that thelocus of the follower bearing 64 will establish both the angularposition of the tube 50 and thus of the arm 52 as well as the axialposition of the tube 50 relative to the riser 14 in which it is slidablyand rotatably mounted. To position the bearing follower, a pair ofbifurcated cam members 66 and 68 are adjustably positioned within theriser 14 as shown in FIG. 2. The member 66 is clamped about the slide 30to which the movable feed wheel 22 is connected by way of the arm 26 andbeam extension 28, thereby insuring that the cam member 66 will be moveddirectly with movements experienced by the axis of the feed roller 22 toaccommodate different thicknesses of skin fed between it and the fixedroller 20. The camming member 68 is carried for adjustable fore and aftpositioning by a rotatable screw 70 having a position control knob 72projecting from the front wall of the riser 14. As shown in FIG. 2, thecamming member 66 carries a forwardly and downwardly directed cammingsurface 74 whereas the camming member 68 carries a rearwardly anddownwardly facing, inclined camming surface 76, the camming surfaces 74and 76 being formed on bifurcated interleaved fingers so that themembers 66 and 68 may be engaged against lateral separation. Therespective camming surfaces 74 and 76 extend at 45 to the vertical andmerge to establish an inverted V-shaped cradle for the follower bearing64. The effect of this arrangment is that if the member 66 is movedforwardly by outward movement of the feed wheel 22 to accommodate anincreased thickness of skin fed between it and the fixed feed wheel 20,the point of intersection between the camming surface 74 thereon and thecamming surface 76 on the member 68 will be advanced forwardly by halfthe distance through which the member 66 is moved. Hence, the tube 50and guide mechanism 54- will similarly be moved so that the lattermaintains a medial position between the feed rollers assuming that suchmedial position was established initially. Manual adjustments of theposition established by the locus of the bearing follower 64 may be madeby rotating the knob 72 to change the fore and aft position of thebearing member 68. The bearing follower 64 is maintained in the cradleestablished by the surfaces 74 and 76 by a treadle (not shown) connectedto linkage 77 coupled to the rear end of the tube 50. A return spring 78(FIG. imparts a rotational bias on the tube 50 against the treadle.Also, a mercury switch 79 (FIG. 1) is carried by the link 77 to controlthe delivery of air to the hose 51 in a known manner.

A more complete understanding of the guide mechanism 54 and itsoperation may be had by reference to FIGS. 6-12 of the drawing. As shownin FIGS. 68, the guide mechanism 54 includes a guide shoe 80 having anelongated ridge plate 81 and a pair of outwardly diverging side blades82 extending from the sides of the ridge plate 81. A bifurcatedsupporting plate 84 extends upwardly from the ridge plate '81 forattachment to a strut 86 by a screw 88, the strut 86, in turn, beingattached adjustably to the terminal end of the tube arm 52 by a furtherscrew 90. The leading end of the shoe 80 is formed with a notch 92 (FIG.8) in the ridge plate portion 81 to receive a pivotal separating blade94 (FIG. 6) having a similar notch 96 formed therein at the base of anupstanding control lever portion 98. As shown most clearly in FIG. 6,the separating blade 94 tapers rearwardly to a point 100 at its trailingend. The shoe 80 and separating blade 94 are preferably assembled byadvancing the blade 94 longitudinally under the ridge plate 80 of theshoe until the notches 92 and 96 interengage to establish a pivotalconnection between the blade 94 and the shoe 80. To secure the assembly,the trailing tip 100 of the blade 94 is soldered, welded or otherwisefixed to the ridge plate 81 centrally thereof. Since the trailing tip100 undergoes very little if any movement, this manner of connecting theseparating blade 94 to the shoe 80 will permit pivotal movement of theleading end of the blade 94 relative to the shoe 80 with a slightmeasure of flexing in the blade 94 due to the fixed connection of thetip 100 thereof to the shoe.

An air nozzle in the form of a cylindrical sleeve 102 is rotatablymounted on the open end of the tube arm 52 and carries a plurality ofinclined louver-like vanes 104 or other fluid directing means across theterminal end or mouth thereof. An aperture 106 formed in the side of thesleeve 102 is notched to cooperate with a pin 108 on the arm 52 tofacilitate angular adjustment of the nozzle and thus of the vanes on thetube arm 52. A knob 110 may be provided on the nozzle 102 to facilitatesuch adjustment manually. Also, it is to be noted that the mouth end ofthe sleeve 102 is formed with a notch 112 to receive the control arm 98on the separating blade 94, the assembled connection of these twomembers being illustrated most clearly in FIG. 7 of the drawings.

The notch 112 is located to lie in a diametric plane normal to the vanes104, or parallel to the direction in which air is deflected by the vanes104, and on the side of the sleeve 102 toward which the air is directedby the vanes. Because of this arrangement, when the nozzle 102 isrotated to change the direction of air flow as directed by the vanes104, the upstanding control arm 98 on the separating blade 94 will becarried with the notch to pivot the blade 94 in a direction opposite tothat in which air is directed by the vanes. The importance of thisinterrelation of the blade 94 and the nozzle 102 may be appreciated byreference to FIGS. 10-12 of the drawings. The cross-section through apair of fur strips A and B in FIG. 10, is taken at a plane locatedimmediately upstream of nozzle 102 as it is shown in FIG. 9. The twostrips A and B each include a skin S and fur F, the skins beingsymmetrically disposed relative to a medial plane YY which lies midwaybetween the feed Wheels 2 0 and 22. Because of the natural pitch or lieof the fur F on the respective skins, the fur on the strip A extendsover the edge of the skin and into the medial plane YY whereas the furon the skin B extends in the other direction or away from the medialplane YY. Inasmuch as the fur sides of the two strips A and B arebrought against one another by the feed wheels 20 and 22 in the actualsewing operation, it will be appreciated that the fur on the strip Awill tend to project behind the skin S and pose problems to thedevelopment of an effective seam. In accordance with the presentinvention however, this problem is overcome in part by the directionalair nozzle 102 and in part by pivotal movement of the separating blade94. Specifically, and as shown in FIG. 11, upon passing under the airnozzle 102 which has been adjusted to direct air more heavily againstthe fur of the strip A than on the strip B, the fur tending to projectup through the seam on the strip A will be blown downwardly as shown.Because there will be a build-up of fur on the sewing edge of the stripA, the corresponding pivotal action of the separating blade 94 as shownin FIG. 12 will compensate for this build-up and facilitate the guidingof the strips to the feed wheels 20 and 22 of the sewing machine. Yetthe adjacent or seam edges on the respective strips A and B will bepresented in true overlying coextensive relation to the feed wheels 20and 22, the height of the skin above the needle 34 being governed by thelower surface of the ridge plate 81 in the manner described in theaforementioned US. Pat. No. 2,588,281.

To prepare the machine for operation, the operator first determines thelie of the fur F on the two strips A and B to be sewn and adjusts thenozzle 102 so that the proper notch in the opening 106 therein registerswith the pin 108 on the arm 52. In the example illustrated in FIGS. 1012of the drawings, the nozzle 'would be adjusted so that the vanes 104therein were inclined toward the left of the medial plane YY and so thatthe blade 94 beneath the ridge plate 81 in the shoe is inclined towardthe right as shown respectively in FIGS. 11 and 12. If on the otherhand, no detectable imbalance of hair at the edges of the strips to besewn could be observed, the nozzle and thus the blade would be adjustedto a neutral position or one in which the vanes were directed in linewith the medial feed plane Y-Y and so that the blade 94 assumed a trulyvertical position. Correspondingly, if the imbalance of fur on thestrips were the reverse of that shown in FIGS. 10-12, the nozzle andblade would be adjusted to the opposite direction of that shown.

Because of the return spring 7 8 (FIG. 5), the rest position of the arm52 will be elevated to that shown by phantom lines for example, in FIG.9 of the drawings. To initiate the sewing operation, the treadle (notshown) to which the linkage 77 is connected is depressed, causing air tohow through the tube 50 and out through the nozzle 102, and rotating thetube 50 so that the arm moves downwardly to the position illustrated insolid lines in FIG. 9 of the drawings. This operative position of thearm 52 and thus of the guide mechanism 54 is established by engagementof the follower bearing 64 on the pin 62 connected to the tube 50 (FIGS.2 and 4) moving into the inverted V-shaped cradle established by theinclined camming surfaces 74 and 76 on the members 66 and 70respectively. As various thicknesses of skins are incurred, causingoutward movement of the feed wheel 22 relative to the fixed axis feedwheel 20, the cam member 66 will be moved accordingly. Because of the 45disposition of the cam surfaces 74 and 76, the locus of the cradleformed thereby and thus of the bearing follower 64 will be moved throughhalf the distance through which the wheel 22 is moved to maintain thefeeding center of the guide shoe 80 and blade 94 on the medial planebetween the feed wheels 20 and 22. Some attendant vertical repositioningof the guide shoe 80 will occur with such lateral positions. Because theswing of the shoe approaches tangency with the plane of the needle 34,however, such vertical repositioning will be negligible. If on the otherhand, the wheel moves through a distance exceeding that anticipated withthe particular skins of the fur strips being sewn, an appropriateadjustment can be made by repositioning the cam member 68 by manualrotation of the knob 72.

Thus it will be appreciated that by this invention there is provided ahighly improved guide mechanism for fur sewing machines and by which theabove-mentioned objections are completely fulfilled. Although the embodment disclosed is preferred, structural variations therefrom arecontemplated. Accordingly, the foregoing description is intended to beillustrative and not limiting in connection with the true spirit andscope of the present invention.

What is claimed is:

1. A guide for directing strips of fur to a fur sewing machine, saidguide comprising: a guide shoe having an elongated ridge plate portionand a pair of outwardly diverging side blades extending from said ridgeplate portion, and a separating blade mounted centrally along said ridgeplate portion extending between said side blades in generally parallelrelation to the direction of strip feed,

said separating blade being pivotable over at least the front portion ofits length at the juncture thereof with said ridge plate portion towardone or the other of said side blades.

2. The apparatus recited in claim 1 wherein said separating blade ispivotally connected at its front end to the front end of said guideshoe, the trailing rear end of said separating blade being fixed to saidguide shoe.

3. The apparatus recited in claim 2 wherein said separating blade tapersto a point on its trailing end.

4. The apparatus recited in claim 1 wherein said separating blade andsaid ridge plate portion are formed having inter-engaging notches tosecure said separating blade pivotally to said shoe.

5. The apparatus recited in claim 1 including means to adjust and securethe pivotal position of said separating blade relative to said shoe.

6. Apparatus for guiding strips of fur to a fur sewing machine, saidapparatus comprising in combination: a guide shoe having an elongatedridge plate portion and a pair of outwardly diverging side bladesextending from said ridge plate portion, a separating blade mountedcentrally along said ridge plate portion and extending between said sideblades, said separating blade and said side blades establishing adjacentpaths of feed for a pair of fur strips to be sewn, one such path on eachside of said separating blade, said separating blade being pivotableover at least the front portion of its length at the juncture thereofwith said ridge plate portion toward one or the other of said sideplates, and means positioned in front of said guide shoe for discharginga stream of air between said paths of feed to clear hair from the edgesof the skin of the fur passing through said guide shoe and to be joinedby sewing.

7. The apparatus recited in claim 6 wherein said air stream dischargingmeans is adjustable to direct the stream to one side or the other of amedial plane between the paths of strip feed.

8. The apparatus recited in claim 7 including means interengaging saidair stream discharge means with said separating blade so that saidseparating blade is pivoted to the side of said medial plane oppositefrom the side of said plane to which said air stream is directed.

9. The apparatus recited in claim 6 wherein said air stream dischargingmeans comprises a nozzle in the form of a rotatably adjustablecylindrical sleeve defining a discharge mouth, and at least one inclinedvane across said mouth to direct air in the direction of inclination ofsaid vane.

10. The apparatus recited in claim 9 wherein sa d separating bladeincludes an upstanding control arm near the front portion thereof, andmeans engaging said control arm with said sleeve to pivot saidseparating blade in a direction opposite to that direction in which theair stream is directed by said nozzle.

11. The apparatus recited in claim 10 wherein said means engaging saidsleeve with said control arm includes a notch formed in the mouth end ofsaid sleeve, said notch receiving the upper end of said control arm andbeing located in a diametric plane normal to said vane and offset fromsaid vane in the direction to which the air is directed thereby.

References Cited UNITED STATES PATENTS 524,994 8/1894 Allen 1112-149645,539 3/ 1900 Allen 112-149 770,678 9/1904 Cunningham 112-1491,559,267 10/1925 Lipshitz 112-20X 2,730,056 1/1956 Wiesenfeld 112-202,588,281 3/1952 Olday 112-20 JORDAN FRANKLIN, Primary Examiner G. V.LA'RKIN, Assistant Examiner

